class A:
    def __init__(self):
        self.age = 12


class B:
    def __init__(self):
        self.name = '李四'


class C(B, A):
    def __init__(self):
        B.__init__(self)
        A.__init__(self)

    def show(self):
        print(self.age, self.name)


c1 = C()
c1.show()
